Head frame for mast hoists



June l5 1926. 1,588,998 c. G. scHMlD HED FRAME FOR MAST HOISTS FiledFeb. 28 1925 5 ShelSheet l INVENTOR.

gw aww@ ATTORNEY' June 15 1926. 1,588,998

c.. G. scHMlD4 HEAD FRAME FOR MAST HOISTS Filed Feb. 28, 1925 5Sheetlshet 2 j?. Z n

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ATToRNEY June 15 1926. 1,588,998 c. G. scHMlD HEAD FRAME FOR `MASTHOISTS Filed Feb. 28, 1925 5 Sheets-Sheet 5 ooooo INVENTOR gn/M ma,

A TTORNE YJ June' 15, 192s. 1,588,998 C. G. SCHMID HEAD FRAME FOR MASTHoIsTs Filed Feb. 28 1925 A TTORNEY` June l5, 1926. 1,588,998

c. G. scHMlD- v HEAD FRAME FOR MAST HOISTS Filed Feb. 28, 1925 5Sheetsl-Sheet 5 INVENTOR.

J0 E @M gam@ www - ATTORNEY Patented June h15, 1926.

UNITED STATES PATENT OFFICE.

CARL Gf. SCHMID, OF INDIANAPOLIS, INDIANA, ASSIGNOR T0 INSLEYMANUFACTUR- ING COMPANY, F INDIANAPOLIS, INDIANA, A. CORPORATION OFINDIANA.

HEAD FRAME FOR MAST I-IISTS.

Application filed February 28, 1925. Serial No. 12,356.

My invention relates to improvements in material handling apparatus andhas particular' reference to the type of apparatus for elevating suchmaterial as wet concrete and the like to a predetermined height and thendelivering the same to conveyor chutes which convey the material to thepoint at which it is intended to be used. It is particularly applicableto the type of apparatus commonly known as mast hoist now commerciallyused in building operations.

One of the objects of my invention is to provide an improved means forreceiving the material elevated on the mast in a bucket r from saidbucket and delivering the same to the conveyor chute. More particularlymy invention relates to improvements in means for bridging the spacebetween the delivery mouth of the bucket and the receiving hopper onthemast, which means shall be automatically operated to bridge the spacewhen the bucket is in delivery position and to be moved out of the pathof the bucket when the bucket is lowered.

For the purpose of disclosing my invention I have illustrated certainembodiments thereof in the accompanying drawings in which,

Fig. 1 is a side elevation of a mast hoist and its accompanyingequipment embodying my invention;

Fig. 2 is a` detail in rear elevation of a part of the head frameembodying my invention;

Fig. 3 is a plan view of the head frame;

Fig. l is a detail showing the position of the parts prior to dumping;

Fig. 5 is a sectional View on the line 5-5 of Fig. 3 and substantiallylike Fig. l, showing the parts with the bridge pan in receivingposition;

Fig. 6 is a view similar to Figs. 4t and 5 showing the parts in completedumping position with the bridge pan in receiving position and thebucket gate opened;

Fig. 7 is a sectional View on the line 7-7 of Fig. 5, and

Fig. 8 is a detail section on the line 8-8 of Fig. 7.

In the -embodiment of the invention illustrated I provide a mast 1 onwhich the various parts are suitably supported and which preferablycomprises lfour angle iron posts 2 suitably laced together by lacing andprojects to the opposite side, or rear side of Y the mast, and in turndelivers the material to the hopper head 7 of a conveyor chute 8. Thisconveyor chute at its inner end is sup ported from and adjacent to themast and is inclined outwardly and downwardly to deliver into a secondconveyor chute 9 which Vin turn delivers to a third conveyor chute 10.The conveyor chute 8 has its outer end supported from the mast by meansof a suitable guy cable 11 which preferably eX-V tends from a point nearthe top of the mast to the outer extremity of the chute and is alsobraced by a boom 12 which is connected to the outer end of the chute andis inclined downwardly and connected to the mast at its lower end. Thechute 9 is pivotally hung from the chute 8 and is provided with asuitable counter-balancing frame 13 provided with a counter-balanceweight 111.

The mast is also provided with a hoisting boom 15 which is preferablymounted on the mast at the 'same point that the bracing boom 12 joinsthe mast. This boom permits the handling of the various types ofmaterial used in building operations. Also, on the rear or inner face ofthe mast there Vis preferably provided a vertically movable `ofterminology rather than the specific positioning of the parts.

Near the upper end and on the rear face of the mast there is mounted asupporting frame which comprises the vertical side members 17 connectedby top and bottom cross members 18 and suitably braced by diagonalbraces 19. This frame has inwardly projecting arms 2O and 21 whichembrace the angle iron posts of the masts and are provided with guidelips 22, which not only serve as means for bolting the frame to theposts ot' the mast but also provide a guiding means for the frame whenthe same is moved vertically on the mast from one position to another.This frame is provided with a pair of laterally extending ears 23 towhich is hinged a frame 24 provided with ears 25 through which and theears 23 the supporting rod 26 is adapted to pass for swingingly loclingthe two frames together. Normally, the frame 24 is held against swingingmovement by a brace 2"? extend ing between the top arm of the frame 24and the top of a pair of arms 21. This frame 24 at its outer end carriesthe receiving hopper 5 and, due to the fact that the frame 24 extendsdiagonally along the side of the mast the receiving hopper is supportedat the front face and to one side of the mast. This hopper, at its lowerend, is provided with a hopper bottom 28 which delivers into thetransversely extending chute 6, which chute at its delivery end issupported at the pivotal center of the frame 24 and at its receiving endprojects beneath the hopper bottom 28 of the hopper 5.

The bucket 4 is of the hopper bottom type and is provided with adelivery mouth 29 adapted to deliver to the side of the mast and intothe receiving hopper 5. This delivery mouth is preferably closed at itsdelivery end by a hinged gate 30 hingedly mounted on a cross rod 31passing through the sides of the bucket through suitable supportingangles 32 ou the under face of the mouth 2Q. The side members of thegate project beyond the rod 31 and have extending between the same across rod 33 to which is attached a link rod 34 on which is mounted a.coiled spring 35 interposed between stop nuts 36 on vthe rod and a stoplinger 37 on the under face of the bucket, whereby the bucket is urgedunder the influence of the coiled spring to its normal or closedposition. A crank shaft 38 is mounted on the under face of the deliverymouth and a crank arm 39 of this shaft is connected by a link 40 withthe cross rod 32. An opposite crank arm 4l which comprises a trip arm ismounted on this crank shaft 38 and is projected forwardly having mountedon its front a roller 42.

Due to the fact that the hoisting' bucket 4 reciprocates vertically pastthe relatively stationary hopper 5 there must be a clearance between thedelivery mouth of the bucket and the side of the hopper. lVhen the gate30 of the bucket is opened for discharging the contents thereof somemeans must be provided for bridging the space between the delivery mouthof the bucket and the hopper and to this end provide a bridge pan orchute 43. This bridge pan preferably takes a chute formation and' ispivotally mounted on the hopper 5, the sides of the hopper being cutaway to form a mouth for the reception of the pan. The pan is mounted ona crank shaft 44 in turn journaled in suitable journals 45 secured inthe mouth of the hopper 5. This crank shaft has at one end a crank arm46 which is connected to a rod 47 surrounding which is a coiled spring48 interposed between a stop 49 on the hopper and a stop nut 50 on theend of the rod whereby a constant tendency is exerted to rock the bridgepan into its vertical or non-operative position. The opposite end of theshaft 44 is provided with a crank arm 51 connected by a link 52 with arocking lever 53 pivoted on a bracket 54 extending from the frame 24.This rocking lever 53 is provided with an inclined cam surface 55 and asubstantially straight cam surface 56 and is prevented from rocking toofar in one direction by a stop arm 57. The cam surfaces of the rockinglever are adapted to be engaged by the roller 42 on the crank arm 41 forthe purpose of first rocking the shaft 44 to move the bridge pan 43 froma substantially vertical position to a substantially horizontal positionand second rocking the sha-ft 38 to raise and open the gate 30.

Tn operation, with the bucket ascending` the parts are in their normalposition ai; illustrated in Fig. 4, that is, the bridge pau is in itssubstantially vertical position and out of the path of the bucket mouthand the bucket gate is in its lowermost or closed position. lilith theseparts thus positioned, as illustrated in Fig. 4, the rocking lever` 53is inclined outwardly and the cam surface 55 is in the path of theroller 42 in the end of the crank arm 4l. As the bucket ascends to itsdumping position the roller 42 engages the calm surface 55 on therocking lever 53, thereby moving this lever toward the vertical androcking the bridge pan into its delivery or substantially horizontalposition as shown in Fig. 5. It will be understood of course, thatduring this movement the bucket is ascending so thaiL by the time thebridge pan has been moved vto its substantially horizontal position themouth of the bucket will have passed the bottom of the bridge pan, thuspermitting the bridge pan to move into its delivery position withoutinterference. As the roller continues to ascend the rocking lever isbrought to a stop by the stop arm 5i', thereby preventing further givingof the rocking lever and as the bucket continues to ascend theengagement of the roller` I2 with the cam surface 55, tilts the arm 4ldownwardly rocking the shaft 38, which, through its crank arm connectionwith the gate 30, will tilt the front cnd of the gatey upwardly therebyopening the same as illustrated in F ig. 6. The gate is held in itsopened position during the discharge et the bucket by the engagement orthe roller on the cam face 56. This cam face it will be noted, is madesuiiciently long to allow for a slight continued vertical movement otthe bucket after it has reached its discharge` position. It will beunderstood of course that suitable means are provided for stopping thebucket at its discharge position and preventing the same fromover-running this position to too great an extent.

As the bucket descends the operation oi. the parts is reversed. That is,{irst the roller 42 rides ott the cam surface 56 and as it rides downthe inclined surface 55 the crank arm Ll1 is permitted, under theinluencel of the coiled spring 35 and the Weight of the bucket gate, toassume a sub stantially horizontal position While the gate lowers to aclosed position. Before the mouth of the bucket reaches the bottom oitthe bridge pan 43 the roller will have sulficiently cleared the inclined'face 55 of the rocking arm to permit the i'ocking arm to swingoutwardly and the bridge pan inwardly and toward its vertical positionunder the influence ot the coiled spring 58, thereby permitting thebucket mouth to clear the bridge pan in its descending run.

I claim as my invention:

l. In an apparatus for handling building material7 the combination witha mast, of a chute hopper supported on said `mast, an elevator bucketvertically movable on said mast having a delivery opening and a gate forcontrolling said opening, a bridge pan normally out of the path of saidbucket, means movable with said bucket and means relatively stationarycooperating` With one another as the bucket moves to dumping position toiirst move said bridge pan into ridging position and then open thebucket gate.

2. In an apparatus for handling building material, the combination witha mast, of a chute hopper supported on said mast, an elevator bucketvertically movable on said mast having a delivery opening and a gatecontrolling the same,v a bridge pan normally out of the path ot'movement ot said bucket, means movable with said bucket and meansrelatively stationary co-operat ing with one another upon the reciprocalVmovement of the bucket to project the. bridge pan into bridgingposition and open the bucket gate and to close the bucket gate and movethe bridge pan out of the path of the bucket.

3. In an apparatus for handling building material, the combination witha mast, of a chute hopper supported on said mast, an elevator bucketvertically movable on said mast having a delivery opening and a gatecontrolling the same, a bridge pan normally out of the path oi movementof said bucket, a trip member movable Ywith the bucket and a trip memberrelatively stationary engaged by said bucket trip member and movedthereby to operate the bridge pan and adapted to move said bucket tripmember to operate said gate.

Li. In an apparatus for handling building material, the combination Witha mast', of a .chute hopper supported on said mast, an elevator bucketvertically movable on said mast having a delivery opening` and a gatefor controlling the same, a bridge pan nori mally out of the path ofmovement of said bucket, an operating member `for the bridge pan and anoperating member for the bucket gate, each ot said members acting as atrip for the opposite member.

5. In an apparatus for handling building material, the combination witha mast, of a chute hopper supported on said mast, an elevator bucketvertically movable on said mast and having a delivery opening and a gatefor controlling said opening7 a. bridge pan, means for projecting andretracting the bridge pan and means for opening and closing the bucketgate, each of said means acting as a trip for the opposite means.

6. In an apparatus for handling building material, the combination witha mast, of a chute hopper supported on said mast, an elevator bucketvertically movable on said mast and havinga delivery opening and a gatefor controlling the same, a bridge pan, a rocking lever for said bridgepan and a rocking lever for said gate, said levers being so co-relatedthat the bridge pan lever opcrates to rock the bucket lever and thebucket lever operates to rock the bridge pan lever.

7. In an apparatus for handling building material, the combination Witha mast, of a chute hopper supported on said mast, an elevator bucketvertically movable on said mast having a delivery opening and a gate forcontrolling the same, a bridge pan on said chute hopper normally insubstantially vertical position out or' the path of movement of thebucket and means operated by the vertical movement of the bucket forrocking the upper free end of the bridge pan downwardly to move the panto substantially horizontal and bridging position.

8. In an apparatus for handling building material, the combination witha mast, of a chute hopper supported on said mast, an elevator bucketvertically movable on said mast having a. delivery opening and a gatecontrolling the same, a bridge pan hingedly mounted on said chute hopperand means operated by the'vertical movement of the bucket for rockingthe pan on its hinges to move the upper free end of the pan downwardlyinto bridging position and upwardly out of bridging position.

9. In an apparatus for handling building material, the combination withmast, o a chute hopper supported on said maat, an elevator bucketvertically movable on said mast having a delivery opening and a gate forcontrolling the same, a bridge pan hingedly mounted on said hopper andmeans operated by the vertical movement ol the bucket for alternatelyrocking the bridge pan on its hinges to move the i'ree upper enddownwardly to bring' the pan into subn stantially horizontal positionand upwardly to move the pan into vertical and non-bridging position.

l0. In an apparatus for handling building material, the combination witha. mast, oit' a chute hopper supported on said mast,

an elevator bucket vertically movable on said mast having a deliveryopening and a gate controlling the same, a. bridge pan, a crank shaft onsaid bucket connected With said gate for operating the same, anoperating arm for the crank shaft, a crank shaft 'for operating thebridge pan, an operating lever for the crank shait, said operating leverbeing adapted to be engaged by the operating arm (fluring a part of themovement of the bucket and to move the operating arm during acontinuation of said bucket movement, the inter-engagement of said leverand arm being such as to hold the parts in the position to which theyhave been moved While the bucket is in dumping position.

In Witness whereof, I CARL G. SCHMm, have hereunto set my hand atIndianapolis, indiana, one thousand nine hundred and tiventyiivc.

CARL Gr. SCHMID.

